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Better NtDeviceIoControlFile logging for ntsockets #99
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The code is kinda ugly with goto, but it's about as clean as I can get it to re-use existing log formatter in cases where exceptions may occur / sanity checks fail.
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Summary of Changes
Hello @KillerInstinct, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
This pull request focuses on enhancing the visibility and detail of network-related operations within ntsockets
by significantly upgrading the NtDeviceIoControlFile
hook. It introduces intelligent handling for various AFD IOCTLs, including pre-call buffer preservation and post-call asynchronous event waiting, to provide comprehensive and accurate logging of network traffic and associated metadata.
Highlights
- Enhanced NtDeviceIoControlFile Logging: I've significantly improved the logging for
NtDeviceIoControlFile
calls, specifically targeting network-related IOCTLs such asAFD_BIND
,AFD_CONNECT
,AFD_SEND
, andAFD_RECV
. The new logging provides more detailed and context-specific information for these operations. - Input Buffer Preservation: To ensure accurate logging, especially for
IOCTL_AFD_SEND
, I've implemented logic to save a copy of theInputBuffer
before the originalNtDeviceIoControlFile
call. This is crucial because the buffer might be modified or clobbered during the API execution. - Asynchronous I/O Logging for Recv: For
IOCTL_AFD_RECV
operations that returnSTATUS_PENDING
, I've added a mechanism to wait for the associated event to be signaled. This allows the hook to capture and log the actual received data after the asynchronous operation completes, preventing deadlocks and providing complete payload information. - Custom Network Utility Functions: I've introduced custom implementations for
inet_ntop
(namedour_inet_ntop
) andntohs
(namedour_ntohs
) to handle IP address and port conversions robustly within the logging context, ensuring proper data interpretation.
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Code Review
This pull request enhances logging for NtDeviceIoControlFile
with detailed parsing for AFD socket operations and uses __try
/__except
for handling potentially invalid user-mode pointers. The review identified critical issues related to unchecked memory allocation results, which could lead to null pointer dereferences and crashes, and minor correctness and style issues.
The code is kinda ugly with goto, but it's about as clean as I can get it to re-use existing log formatter in cases where exceptions may occur / sanity checks fail.
Untested :)